Fuzz testing is incredibly useful: it has caught many a bug during the development of NTP packet parsing and gzip/bzip2 (de)compression. But I've always been unsatisfied with the fuzzer being a b ...
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The original was posted on /r/rust by /u/folkertdev on 2025-05-06 10:21:22+00:00.

What is my fuzzer doing when it runs for hours, reporting nothing? I have never been sure that a fuzzer effectively exercises the code I was interested in.

No more! This blog post shows how we set up code coverage for our fuzzers, improved our corpus, and some other fuzzing tips and tricks: